net/systemeD/halcyon/Map.as

   1 package net.systemeD.halcyon {
   2
   3         import flash.text.TextField;
   4         import flash.display.DisplayObjectContainer;
   5         import flash.display.Sprite;
   6         import flash.display.Shape;
   7         import flash.display.Stage;
   8         import flash.events.*;
   9         import net.systemeD.halcyon.styleparser.*;
  10         import flash.net.*;
  11
  12     public class Map extends Sprite {
  13
  14                 public const MASTERSCALE:Number=5825.4222222222;// master map scale - how many Flash pixels in 1 degree longitude
  15                                                                                                                 // (for Landsat, 5120)
  16                 public const MINSCALE:uint=13;                                  // don't zoom out past this
  17                 public const MAXSCALE:uint=19;                                  // don't zoom in past this
  18
  19                 public var ruleset:RuleSet=new RuleSet();               // rules
  20
  21                 public var ways:Object=new Object();                    // geodata
  22                 public var nodes:Object=new Object();                   //  |
  23                 public var pois:Object=new Object();                    //  |
  24                 public var relations:Object=new Object();               //  |
  25
  26                 public var scale:uint=14;                                               // map scale
  27                 public var scalefactor:Number=MASTERSCALE;              // current scaling factor for lon/latp
  28                 public var bigedge_l:Number= 999999;                    // area of largest whichways
  29                 public var bigedge_r:Number=-999999;                    //  |
  30                 public var bigedge_b:Number= 999999;                    //  |
  31                 public var bigedge_t:Number=-999999;                    //  |
  32                 public var bscale:Number=Math.pow(2,scale-13);  // scale factor (2**(zoom-13))
  33
  34                 public var waycount:uint=0;                                             // ways:                number currently loaded
  35                 public var waysrequested:uint=0;                                //                              total number requested
  36                 public var waysreceived:uint=0;                                 //                              total number received
  37                 public var relcount:uint=0;                                             // relations:   number currently loaded
  38                 public var relsrequested:uint=0;                                //                              total number requested
  39                 public var relsreceived:uint=0;                                 //                              total number received
  40                 public var poicount:uint=0;                                             // POIs:                number currently loaded
  41                 public var whichrequested:uint=0;                               // whichways:   total number requested
  42                 public var whichreceived:uint=0;                                //                              total number received
  43
  44                 public var edge_l:Number;                                               // current bounding box
  45                 public var edge_r:Number;                                               //  |
  46                 public var edge_t:Number;                                               //  |
  47                 public var edge_b:Number;                                               //  |
  48
  49                 public var baselon:Number;                                              // urllon-xradius/masterscale/bscale;
  50                 public var basey:Number;                                                // lat2lat2p(urllat)+yradius/masterscale/bscale;
  51                 public var mapwidth:uint;                                               // width (Flash pixels)
  52                 public var mapheight:uint;                                              // height (Flash pixels)
  53
  54                 private var dragging:Boolean=false;                             // dragging map?
  55                 private var lastxmouse:Number;                                  //  |
  56                 private var lastymouse:Number;                                  //  |
  57
  58                 public var backdrop:Object;                                             // reference to backdrop sprite
  59
  60                 public var connection:AMFConnection;                    // server connection
  61
  62                 // ------------------------------------------------------------------------------------------
  63                 // Map constructor function
  64
  65         public function Map() {
  66
  67                         for (var l:int=0; l<11; l++) {                          // 11 layers (10 is +5, 0 is -5)
  68                                 var s:Sprite=new Sprite();
  69                                 s.addChild(new Sprite());                               // [layer][0]=fill, [1]=stroke, [2]=names
  70                                 s.addChild(new Sprite());
  71                                 s.addChild(new Sprite());
  72                                 addChild(s);
  73                         }
  74
  75                         connection=new AMFConnection(
  76                                 "http://127.0.0.1:3000/api/0.6/amf/read",
  77                                 "http://127.0.0.1:3000/api/0.6/amf/write",
  78                                 "http://127.0.0.1:3000/api/crossdomain.xml");
  79                         connection.getEnvironment(new Responder(gotEnvironment,connectionError));
  80
  81         }
  82
  83                 public function gotEnvironment(r:Object):void {
  84                         init(52.022,-1.2745);
  85                 }
  86
  87                 // ------------------------------------------------------------------------------------------
  88                 // Initialise map at a given lat/lon
  89
  90         public function init(startlat:Number,startlon:Number):void {
  91
  92                         ruleset.load("test.yaml?d="+Math.random());
  93 //                      rules.initExample();            // initialise dummy rules
  94
  95                         updateSize();
  96                         baselon  =startlon                      -(mapwidth /2)/MASTERSCALE/bscale;
  97                         basey    =lat2latp(startlat)+(mapheight/2)/MASTERSCALE/bscale;
  98                         addDebug("Baselon "+baselon+", basey "+basey);
  99                         updateCoords(0,0);
 100                         addDebug("L "+edge_l+", R "+edge_r);
 101                         download();
 102
 103         }
 104
 105                 // ------------------------------------------------------------------------------------------
 106                 // Recalculate co-ordinates from new Flash origin
 107
 108                 public function updateCoords(tx:Number,ty:Number):void {
 109
 110                         bscale=Math.pow(2,scale-13);
 111                         x=tx; y=ty;
 112 //                      scaleX=bscale; scaleY=bscale;
 113
 114                         // ** calculate tile_l etc.
 115                         edge_t=coord2lat((-y          )/bscale);
 116                         edge_b=coord2lat((-y+mapheight)/bscale);
 117                         edge_l=coord2lon((-x          )/bscale);
 118                         edge_r=coord2lon((-x+mapwidth )/bscale);
 119
 120                 }
 121
 122                 // Co-ordinate conversion functions
 123
 124                 public function latp2coord(a:Number):Number     { return -(a-basey)*scalefactor; }
 125                 public function coord2latp(a:Number):Number     { return a/-scalefactor+basey; }
 126                 public function lon2coord(a:Number):Number      { return (a-baselon)*scalefactor; }
 127                 public function coord2lon(a:Number):Number      { return a/scalefactor+baselon; }
 128
 129                 public function latp2lat(a:Number):Number       { return 180/Math.PI * (2 * Math.atan(Math.exp(a*Math.PI/180)) - Math.PI/2); }
 130                 public function lat2latp(a:Number):Number       { return 180/Math.PI * Math.log(Math.tan(Math.PI/4+a*(Math.PI/180)/2)); }
 131
 132                 public function lat2coord(a:Number):Number      { return -(lat2latp(a)-basey)*scalefactor; }
 133                 public function coord2lat(a:Number):Number      { return latp2lat(a/-scalefactor+basey); }
 134
 135 //              public function centrelat(o) { return coord2lat((yradius-_root.map._y-o)/Math.pow(2,_root.scale-13)); }
 136 //              public function centrelon(o) { return coord2lon((xradius-_root.map._x-o)/Math.pow(2,_root.scale-13)); }
 137
 138
 139                 // ------------------------------------------------------------------------------------------
 140                 // Resize map size based on current stage and height
 141
 142                 public function updateSize():void {
 143                         mapwidth =stage.stageWidth; mask.width=mapwidth; backdrop.width=mapwidth;
 144                         mapheight=stage.stageHeight; mask.height=mapheight; backdrop.height=mapheight;
 145                         // addDebug("Mapwidth "+mapwidth+", mapheight "+mapheight);
 146                 }
 147
 148                 // ------------------------------------------------------------------------------------------
 149                 // Download map data
 150                 // (typically from whichways, but will want to add more connections)
 151
 152                 public function download():void {
 153                         if (edge_l>=bigedge_l && edge_r<=bigedge_r &&
 154                                 edge_b>=bigedge_b && edge_t<=bigedge_t) { return; }     // we have already loaded this area, so ignore
 155                         bigedge_l=edge_l; bigedge_r=edge_r;
 156                         bigedge_b=edge_b; bigedge_t=edge_t;
 157                         addDebug("Calling with "+edge_l+"-"+edge_r+", "+edge_t+"-"+edge_b);
 158                         connection.getBbox(edge_l,edge_r,edge_t,edge_b,new Responder(gotBbox,connectionError));
 159                 }
 160
 161                 public function gotBbox(r:Object):void {
 162                         addDebug("got whichways");
 163                         var code:uint         =r.shift(); if (code) { connectionError(); return; }
 164                         var message:String    =r.shift();
 165                         var waylist:Array     =r[0];
 166                         var pointlist:Array   =r[1];
 167                         var relationlist:Array=r[2];
 168                         var i:uint, v:uint;
 169
 170                         for each (var w:Array in waylist) {
 171                                 i=w[0]; v=w[1];
 172                                 if (ways[i] && ways[i].version==v) { continue; }
 173                                 ways[i]=new Way(i,v,this);
 174                                 ways[i].load(connection);
 175                         }
 176
 177                         for each (var p:Array in pointlist) {
 178                                 i=w[0]; v=w[4];
 179                                 if (pois[i] && pois[i].version==v) { continue; }
 180                                 pois[i]=new POI(i,v,w[1],w[2],w[3],this);
 181                         }
 182
 183                         addDebug("waylist is "+waylist);
 184                 }
 185
 186
 187                 // ------------------------------------------------------------------------------------------
 188                 // Redraw all items, zoom in and out
 189
 190                 public function redraw():void {
 191                         addDebug("redrawing");
 192                         var s:String='';
 193                         for each (var w:Way in ways) { w.redraw(); s+=w.id+","; }
 194                         addDebug(s);
 195                         // ** do POIs, etc.
 196                 }
 197
 198                 public function zoomIn():void {
 199                         if (scale==MAXSCALE) { return; }
 200                         changeScale(scale+1);
 201                 }
 202
 203                 public function zoomOut():void {
 204                         if (scale==MINSCALE) { return; }
 205                         changeScale(scale-1);
 206                 }
 207
 208                 private function changeScale(newscale:uint):void {
 209                         addDebug("new scale "+newscale);
 210                         scale=newscale;
 211                         scalefactor=MASTERSCALE/Math.pow(2,14-scale);
 212                         redraw();
 213                 }
 214
 215                 private function reportPosition():void {
 216                         addDebug("lon "+coord2lon(mouseX)+", lat "+coord2lat(mouseY));
 217                 }
 218
 219
 220                 // ==========================================================================================
 221                 // Events
 222
 223                 // ------------------------------------------------------------------------------------------
 224                 // Mouse events
 225
 226                 public function mouseDownHandler(event:MouseEvent):void {
 227                         dragging=true;
 228                         lastxmouse=mouseX; lastymouse=mouseY;
 229                 }
 230
 231                 public function mouseUpHandler(event:MouseEvent):void {
 232                         if (!dragging) { return; }
 233                         dragging=false;
 234                         updateCoords(x,y);
 235                         download();
 236                 }
 237
 238                 public function mouseMoveHandler(event:MouseEvent):void {
 239                         if (!dragging) { return; }
 240                         x+=mouseX-lastxmouse;
 241                         y+=mouseY-lastymouse;
 242                         lastxmouse=mouseX; lastymouse=mouseY;
 243                 }
 244
 245                 // ------------------------------------------------------------------------------------------
 246                 // Miscellaneous events
 247
 248                 public function keyUpHandler(event:KeyboardEvent):void {
 249 addDebug("pressed "+event.keyCode);
 250                         if (event.keyCode==82) { this.redraw(); }                       // R - redraw
 251                         if (event.keyCode==73) { this.zoomIn(); }                       // I - zoom in
 252                         if (event.keyCode==79) { this.zoomOut(); }                      // O - zoom out
 253                         if (event.keyCode==76) { this.reportPosition(); }       // L - report lat/long
 254                 }
 255
 256                 public function connectionError(err:Object=null): void {
 257                         addDebug("got error");
 258                 }
 259
 260                 // ------------------------------------------------------------------------------------------
 261                 // Debugging
 262
 263                 public function addDebug(text:String):void {
 264                         Globals.vars.debug.appendText(text+"\n");
 265                         Globals.vars.debug.scrollV=Globals.vars.debug.maxScrollV;
 266                 }
 267
 268         }
 269 }